Hammer attachment



Oct. 22, 1929. R. H. PETERS HAMMER ATTACHMENT Filed July 25. 1928 Patented Oct. 22, 1929 UNITED STATES PATENT OFF-ICE HAMMER ATTACHMENT Application filed July 25, 1928. Serial No. 295,159.

This invention is a hammer attachment, and has for its prime object to enable the quick, convenient, and effective attachment and detachment of a supplemental striking v head to the head of a ball-pean hammer or standard machinists hammer.

The attachment of the present invention while capable of many uses, is intended primarily for use in hammering out dents and lo disfigurements in sheet metal, as, for in stance, in automobile fenders.

The invention consists in the combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanyin drawings, and particularly pointed out in the appended claims, it, of course, being understood, that changes in the form, proportion, size, and minor details may be made, within the scope of the claims, Without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings,

Figure l is a side elevation of a standard machinists hammer having the attachment of the present invention applied thereto;

Figure 2 is a erspective view of a hammer attachment em odying the features of the present invention;

Figure 3 is a longitudinal sectional view of the attachment of the present invention;

Figure 4 is a detailed elevation of the inner end of the plug or head member of the present invention; and

Figure 5 is an elevation of the outer end of a head member having a different form;

and

Figure 6 is a side elevation of Fig. 5. Figure 7 is an enlarged cross-sectional view on the line 7-7 of Fig. 1.

The'device of the present invention includes a cylindrical sleeve member 1 open at opposite ends, and provided with an external annular shoulder 2 at one end and an internal annular shoulder or seat 3 adjacent the 4 other end of the sleeve.

Associated with the sleeve member is a head or plug member, which, as best shown in Fig. 3 of the drawings, may include a metallic-core 4 having at one end a cylindrical neck or boss 5 of a size and shape to fit readily within the restricted end of the sleeve. This core also has an undercut body portion 6 which is embedded in a cylindrical rubber striking head 7 the inner face of which is flush with the inner face of the neck 5, and the depth or thickness of the neck 5 is equal to the length of the restricted inner end portion of the sleeve 1, whereby the striking head and the sleeve will fit together in close and intimate relation. A screw-threaded opening 8 is provided in the neck portion of the striking head, and is disposed slightly off center as best shown in Fig. 4 of the drawing. A plate or washer 9 lies within the sleeve and against the seat provided by the inner end of the internal annular shoulder 3. This plate or washer is provided with a counter-sunk opening 10 slightly offset from the center. of the plate, and designed to be registered with the screw-threaded opening 8 and for the reception of a screw 11, whereby the striking head may be readily connected to the plate or washer and thereby held to the sleeve. By offsetting the screwthreaded portion and the screw 11, the striking head cannot be unscrewed from the screw 11, and, therefore, will always remainin snug engagement with the sleeve.

The rear end of the sleeve is provided with a pair of clamp members, each of which members consists of a substantially U-shaped stifl but resilient member 12 having its legs secured to the sleeve in any suitable manner, as by being received in openings extending through the shoulder 2. The closed end of each U-shaped clamp member extends a suitable distance beyond the adjacent end of the sleeve, and its cross-bar carries a rubber sleeve 13 which fits the cross-bar snugly but is capable of rotation thereon for a purpose that will be hereinafter explained. The crossbars on the clamp members lie in substantial parallelism and are spaced so as to dispose the inner sides of the rubber sleeves 13 across the opening in the outer end of the metal sleeve 1. A set screw 14 is provided through the shouldered portion 2 of the metal sleeve member 1.

The device of the present invention is applied to a hammer head such as is illustrated in a manner to prevent chattering.

hammer head being received within the socket provided by the larger end of the sleeve 1 with the rubber sleeves of the clamping members snugly engaging the hammer head back of the annular shoulder 16 commonly rovided upon ball-pea'n or standard machinists hammers the end of the hammer head lying against the rear .face of the plate or washer 9. The arts of the attachment are so pro- Egtioned that when the clamp members have n snapped into position upon the hammer head, the attachment will be snugly held upon the hammer head, and by tightening the set screw 14, the attachment will be held in place By loosening the set screw, the attachment may be rotated u on the hammer head.

In app ying the device, the hammer head is tilted or applied in the inclined position indicated in the dotted lines in Fig. 1' so as to force or pry the clamping members apart, and

' then the hammer is turned into its normal position shown in full lines whereupon the attachment will snap into place with the rubber friction sleeves gripping the hammer head in rear of the annular shoulder thereon. The attachment is removed merely by pulling it straight out from the head as the inclined rear walls of the shoulder 16 on the hammer.

head will force the clamp members apart and thereby enable the removal of the device.

The form of the device shown in Figs. 1, 2, and 3 includes a rubber striking head 7, but it will, of course, be understood that this part of the device may be of rawhide, copper, or other suitable soft material.

If a hard striking head is desired, an integral metal plug may be employed such as is shown at 17 in Figs. 5 and 6 of the drawing.

It will, of course, be understood that the striking head may be of any desired configuration in accordance with the shape or condition of the piece of metal to be hammered into shaiiape.

y reason of the fact that the friction sleeves 13 are rotatable upon the cross-bars of the clamp members 12, new surfaces will be presented to the hammer head from time to time in applying and removing the device, wherefore wear. on the sleeves will be distributed around the peripheries thereof.

I claim:

1. A hammer attachment comprising an open ended sleeve having an internal annular seat, a plug to fit in one end of the sleeve and provided with a striking head projecting externally of the sleeves a plate washer to fit against the seat, a detachable fastening between the was'her and the plug, and clamping means to secure the sleeve upon ahammer head.

2. A hammer attachment comprising an open ended sleeve having an internal annular seat, a plug to fit in one end of the sleeve and provided with a strikin head projecting externall of the sleeve, 9. p ate washer to it against t e seat, a. detachable fastening be tween the washer and the plug, and clamping means to secure the sleeve upon a hammer head, and a set screw piercing one of the Walls of the sleeve and located between the seat and the clamping means.

3. A hammer attachment comprising a body provided at one end with a hammer head receivin socket, a pair of resilient substantially U-%1aped hammer head clamping members projecting from the socket end of the body and provided with rubber sleeves on the cross-bar portions of the clamping members, and a detachable head at the opposite end of the body.

4. A hammer attachment comprising an open ended sleeve provided with an internal annular seat adjacent one end of the body, a plate Washer within the sleeve and against the seat and provided with an oii-center counter-sunk opening, a detachable head having a neck portion received within the sleeve and provided with a screw-threaded opening registered with the counter-sunk opening in the plate washer, a screw engaging the screwthreaded opening and the counter-sunk 0 ening in the Washer, and a pair of substantially U-shaped resilient clamping members projecting from the opposite end of the body.

5. A hammer attachment comprising a body provided at one end with a hammer head receiving socket, a pair of resilient substantially U-shaped hammer head clamping members projecting from the socket end of the body, rubber friction sleeves rotatable upon cross-bars of the clamping members, and a detachable head at the opposite end of the body.

ROBERT H. PETERS. 

